import java.util.Scanner;

public class Zxf2 {
    public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
        System.out.println("请输入英寸数");
        int i=in.nextInt();
        double a=2.54*i;
        String cm="厘米";
        System.out.println(a+cm);

    }
}

